Tractor



1.1 is a front elevation view of a tractor, showing our new design;

1.2 is a rear elevation view thereof;

1.3 is a left side elevation view thereof;

1.4 is a right side elevation view thereof;

1.5 is a top view thereof; and

1.6 is an upper left front perspective view thereof.

A bottom view is omitted because it is plain and unornamental and forms no part of the subject matter of the claimed design. 

CLAIM The ornamental design for tractor, as shown and described. 